. Revision of the Amphibia and Pisces of the Permian of North America. slender and curved, with the upper end expanded, butnearly straight, and not curved as in the reptiles. There is no olecranonprocess. The measurements are given in the original description. Genus TRIMERORHACHIS Cope (page 39). Characteristic specimens: Nos. 4565, 4557, 4714, 4584, two Mus. The following description is drawn from several specimens. The skullis rather elongate in the cranial region and very flat. The elongation is MORPHOLOGICAL REVISION 107 shared by all the postorbital bones, no horns or proces
. Revision of the Amphibia and Pisces of the Permian of North America. slender and curved, with the upper end expanded, butnearly straight, and not curved as in the reptiles. There is no olecranonprocess. The measurements are given in the original description. Genus TRIMERORHACHIS Cope (page 39). Characteristic specimens: Nos. 4565, 4557, 4714, 4584, two Mus. The following description is drawn from several specimens. The skullis rather elongate in the cranial region and very flat. The elongation is MORPHOLOGICAL REVISION 107 shared by all the postorbital bones, no horns or processes being otic notches are very slightly developed, but the quadrate region extendsquite a little posterior to the occipital condyle. The sutures of the skullare known only imperfectly; in specimen No. 4557 the sutures can be madeout as far as shown in fig. 36 b. The orbits are relatively small and nearlycircular, and are situated in the anterior third of the skull. They are, withthe nares, entirely superior in position. The nares are not terminal. On.
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Keywords: ., bookcentury1900, bookdecade1910, bookidc, booksubjectpaleontology
